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Patent US4335184A successfully refreshed from Google Patents.
US4335184A
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Recording paper
Assignee: Mitsubishi Paper Mills Ltd
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Filing: 1980-10-14
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Granted: 1982-06-15
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Expires: 2000-10-14
Abstract
Abstract A recording paper improved in image quality, comprising a base paper, the pH of its cold water extract being 5.0 to 10.0, and, disposed thereon, a coating layer containing a saponified-type petroleum resin sizing agent.
Inventors
- 👤 Shigehiko Miyamoto
- 👤 Yoshinobu Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:49
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/50; B41M5/52; B41M5/502; B41M5/508; B41M5/5218; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24934; Y10T428/25; Y10T428/258; Y10T428/27; Y10T428/273; Y10T428/277; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31971; Y10T428/31993
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
96 words
An ink-jet recording paper improved in image quality, comprising a base paper containing substantially no sizing agent and size-fixing agent, the pH of its cold water extract being 5.0 to 10.0, and, disposed thereon, a coating layer containing a saponified-type petroleum resin sizing agent obtained by introducing an α,β-unsaturated carboxylic acid or anhydride into a polymerizate or modified polymerizate of C 4 -C 11 fraction from naphtha cracking and saponifying the polar groups, the application rate of the coating layer being from 0.10 to 1.04 g/m 2 in terms of said saponified-type petroleum resin sizing agent.
Claim 2
Dependent Claim
96 words
An ink-jet recording paper improved in image quality, comprising a base paper containing substantially no sizing agent and size-fixing agent, the pH of its cold water extract being 5.0 to 10.0, and, disposed thereon, a coating layer containing a saponified-type petroleum resin sizing agent obtained by introducing an α,β-unsaturated carboxylic acid or anhydride into a polymerizate or modified polymerizate of C 4 -C 11 fraction from naphtha cracking and saponifying the polar groups, the application rate of the coating layer being from 0.10 to 1.04 g/m 2 in terms of said saponified-type petroleum resin sizing agent.
Claim 3
Dependent Claim
23 words
An ink-jet recording paper according to claim 1, wherein the pH of cold water extract of a base paper is 6.5 to 9.0.
Claim 4
Dependent Claim
20 words
An ink-jet recording paper according to claim 1, wherein the base paper contains calcium carbonate incorporated therein as a filler.
Claim 5
Dependent Claim
24 words
An ink-jet recording paper according to claim 3, wherein the base paper contains 1 to 30% by weight based on pulp of calcium carbonate.
Claim 6
Dependent Claim
24 words
An ink-jet recording paper according to claim 4, wherein the base paper contains 5 to 20% by weight based on pulp of calcium carbonate.
Claim 7
Dependent Claim
15 words
An ink-jet recording paper according to claim 1, wherein the coating layer contains calcium carbonate.
Claim 8
Dependent Claim
24 words
An ink-jet recording paper according to claim 9, wherein the calcium carbonate content of the coating layer is 0.2 to 30 g/m 2 .
Claim 9
Dependent Claim
22 words
An ink-jet recording paper according to claim 1, wherein the saponification value in the saponification of polar groups is 50 or above.
References Cited (Backward Citations)
US4269891A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-06-14 | 1985-12-14 | 1986-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-14 | 1989-12-14 | 1990-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-14 | 1993-12-14 | 1994-06-15 | $7700.00 | Window Closed / Lapsed |